Add backtest equity-curve chart (Slipstream vs SPY) to research tab

static/app.css

@@ -159,3 +159,11 @@ dialog::backdrop{background:#000a}
 .dk small{font-family:var(--mono);font-size:11px;color:var(--faint)}
 .doc-list{font-size:14px;line-height:1.7;color:#c7d2e2;padding-left:20px}
 .doc-list li{margin:8px 0}
+
+/* ---------- doc backtest chart ---------- */
+.doc-chart{margin:18px 0;background:#0b1220;border:1px solid var(--line);border-radius:12px;padding:14px 16px 8px}
+.dc-head{display:flex;justify-content:space-between;align-items:baseline;flex-wrap:wrap;gap:8px;margin-bottom:8px}
+.dc-title{font-size:13px;color:var(--ink);font-weight:600}
+.dc-leg{font-family:var(--mono);font-size:11.5px;color:var(--muted);display:inline-flex;align-items:center}
+.dc-leg i{width:15px;height:3px;border-radius:2px;display:inline-block;margin-right:5px;vertical-align:middle}
+.dc-svg{width:100%;height:auto;display:block}

static/index.html

@@ -112,6 +112,11 @@
         <div class="dk"><span>Years beat SPY</span><b>8 / 13</b><small></small></div>
         <div class="dk"><span>In momentum</span><b>23%</b><small>of months</small></div>
       </div>
+      <figure class="doc-chart">
+        <div class="dc-head"><span class="dc-title">Growth of $100 — Slipstream vs SPY</span>
+          <span class="dc-leg"><i class="lg-fund"></i> Slipstream <i class="lg-spy" style="margin-left:12px"></i> SPY <span class="faint" style="margin-left:12px">2014–2026 · net of cost · log scale</span></span></div>
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+      </figure>
       <table class="doc-table wide">
         <thead><tr><th>Regime</th><th>Fund CAGR</th><th>SPY</th><th>Excess</th><th>Sharpe</th></tr></thead>
         <tbody>